Note 4 - Stock-Based Compensation - Schedule of Unvested Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020
Balance (in shares)	370	0		45
Balance, weighted average grant date fair value (in dollars per share)	$ 24.77	$ 0		$ 15.36
Granted (in shares)		601		0
Granted, weighted average grant date fair value (in dollars per share)		$ 26.31		$ 0
Vested (in shares)		(144)	[1]	(30)
Vested, weighted average grant date fair value (in dollars per share)		$ 30.25	[1]	$ 15.36
Forfeited (in shares)		(87)	[1]	(15)
Forfeited, weighted average grant date fair value (in dollars per share)		$ 26.31	[1]	$ 15.36

[1] Includes the impact of the modification of 21 PRSUs which were cancelled and reissued at a grant date fair value of $28.93.